Automtaically add ipv6 entries to nix flake

flake.nix

@@ -9,7 +9,7 @@
       });
     in
     {
-      nixosModule = { config, ... }:
+      nixosModule = { config, pkgs, ... }:
         with nixpkgs.lib;
         let
           cfg = config.networking.stevenBlackHosts;
@@ -29,9 +29,14 @@
           };
           config = mkIf cfg.enable {
             networking.extraHosts =
-              builtins.readFile (
-                "${self}/" + (if alternatesList != [] then alternatesPath else "") + "hosts"
-              );
+              let
+                orig = "${self}/" + (if alternatesList != [] then alternatesPath else "") + "hosts";
+                ipv6-merged = pkgs.runCommand "hosts" {} ''
+                  echo "127.0.0.1 localhost" > $out
+                  sort ${orig} | uniq | grep "^0" >> $out
+                  sort ${orig} | uniq | grep "^0" | sed "s/0\.0\.0\.0/::/g" >> $out
+                '';
+              in builtins.readFile ipv6-merged;
           };
         };